Wide steel strip for paper cutting blade and manufacturing method thereof

A wide-width steel and steel strip technology, which is applied to the wide-width steel strip for paper cutting blades and its manufacturing field, can solve the problems of low limit temperature, low precision, insufficient spheroidization rate, etc., achieve broad development prospects and ensure thickness accuracy. , the effect of high slitting precision

Active Publication Date: 2018-02-23
浙江龙盛薄板有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The 45Mn material is a medium carbon alloy steel with high strength. Most of it was produced by narrow strip steel factories before. It is relatively easy to produce alloy steel from narrow strip steel, but the precision is low, the plate shape is poor, the annealing temperature is limited by the electric furnace, and the structure is poor.
[0007] Ordinary 45Mn steel on the market has insufficient spheroidization rate and insufficient hardenability due to decarburization on the surface, which cannot fully meet the manufacturing and use requirements of paper cutting blades.

Method used

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  • Wide steel strip for paper cutting blade and manufacturing method thereof
  • Wide steel strip for paper cutting blade and manufacturing method thereof
  • Wide steel strip for paper cutting blade and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1 (45Mn-2B):

[0066] (1) Preparation of converter steelmaking continuous casting billet:

[0067] The refined molten steel is poured into the tundish through the rotation of the rotary table, and then injected into the continuous casting slab crystallizer through double nozzles, and continuously cast into a continuous casting slab of 220*1250*2500mm; the chemical composition of the molten steel is shown in the following table:

[0068] serial number

C(％)

Si(%)

Mn(%)

P(％)

S(％)

Cr(％)

1

0.44

0.21

0.83

0.012

0.002

0.19

2

0.45

0.22

0.82

0.012

0.003

0.22

3

0.46

0.22

0.81

0.011

0.002

0.2

[0069] (2) Hot rolling:

[0070] The continuous casting slab obtained in step (1) is transported by the roller table to the heating furnace, heated to 1100±50°C, dephosphorized by high-pressure water and rolled for 13 passes, and then cooled by the laminar flow cooling syste...

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PUM

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Abstract

The invention provides a wide steel strip for a paper cutting blade. The wide steel strip is characterized in that the content of the chemical components of the steel comprises, by weight, 0.43%-0.47%of C, 0.17%-0.28% of Si, 0.7%-1.0% of Mn, 0-0.035% of P, 0-0.035% of S, 0.15%-0.3% of Cr, and the balance Fe; and the thickness of the wide steel strip 0.45-1.42mm, the width is 23-35 mm. According to the wide steel strip for the paper cutting blade, through repeated testing and trial, requirements of the steel for the paper cutting blade for the strength, the hardness, the size precision, the straightness and the quality requirement of the spheroidized structure can be completely met, and the wide steel strip has been favored by customers at present; and due to the fact that the developmentprospect of the cold-rolled wide steel strip for the paper cutting blade is very wide, the wide steel strip has great popularization and application values and is quite wide in prospect.

Description

(1) Technical field [0001] The invention relates to a wide steel strip for a paper cutting blade and a manufacturing method thereof. (2) Background technology [0002] Paper cutter is an emerging industry formed after the reform and opening up. With the rapid development of news media, express delivery and packaging industries, the demand for paper cutter blades has grown rapidly. The previous shoe knife industry began to shrink, and many blade factories followed the domestic The development trend is to turn to the production of paper cutting blades. 90% of the paper cutting blade specifications are 0.71*24.15. High-degree bending, so the comprehensive performance requirements of the steel after quenching and tempering are relatively high. [0003] The 45Mn material is a medium carbon alloy steel with high strength. It was mostly produced by narrow strip steel factories before. It is relatively easy to produce alloy steel from narrow strip steel, but the precision is low, t...

Claims

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Application Information

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IPC IPC(8): C22C38/18C22C38/02C22C38/04C22C33/04C21D8/02B21C37/04
CPCB21C37/04C21D8/0236C21D8/0268C22C33/04C22C38/02C22C38/04C22C38/18
Inventor 潘小成黄爱军祝海容
Owner 浙江龙盛薄板有限公司
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